Walter blake wright



(No Model.)

W. B. WRIGHT. REGENERATIVE FURNACE.

Patented June 25, 1889.

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UNITED STATES PATENT OFFICE.

IVALTER BLAKE \VRIGHT, OF CHICAGO, ILLINOIS, ASSIGNOR. TO THE INTER- IATIONAL GAS AND FUEL COMPANY, OF SAME PLACE.

REG EN ERATIVE FURNACE.

SPECIFICATION forming part of Letters Patent No. 405,936, dated June 25, 1889. Application filed March 7, 1889. Serial No. 802,378- (No model.) Patented in England April 24, 1889.

To all whom it may concern.-

Be it known that I, WALTER BLAKE IVRIGHT, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Regenerative Furnaces, of which the following is a spccifi cation.

My invention relates to means and devices for operating puddling-furnaces, and particularly such as are called open-hearth furnaces, and has for its object to provide convenient means for controllingthe flow and supply of the fuel-fluids employed.

I 5 My invention is illustrated in the accompanying drawings, wherein Figure 1 is a vertical cross-section with certain parts broken away and others shown in dotted lines, and Fig. 2 is a horizontal section with certain parts removed and others shown in dotted lines.

- Like parts are indicated by the same letters in both figures.

A is the platform upon which the furnace is built.

B is the case or upper work of the furnace; and C is the hearth or bed.

D is the top.

E is a passage called the flue, since it 0 leads to the smoke-stack.

E and E are air-supply passages openin g into the side chambers E and E. I11 the up per part of the chambers E and E are built sections of checker-work in the manner familiarly known, and upon this checker-work in each chamber is laid a series of deflecting blocks or plates E E, one immediately under each fluid-nozzle.

F F are apertures opening into the upper part of the chamber E and containing the :finid-fuel-feeding valves F F. G G are similar apertures opening into the chamber E. These are inwardly enlarged instead of being outwardly enlarged, as are the apertures F F, (either form may be used,) and containing the fluid-fuel-feeding valves G 1 II is one of a series of similar apertures through which passes the lever ll, on the inner end of which is the sliding protector-plate Il adapted,when raised, to cover the aperture IT, and when lowered to cover both the apertures II and G. The internal structure of the furnace on each side is the same, though all the parts are not shown in the dotted lines in the left hand of Fig. 1. Between each two of these levers H H opposite to each other passes the chain or cord ll over the sprocket-wheels H H on the shaft H gwhieh i s itself j ourn aled on the standards II II.

On the platform A, which extends in front of the furnace and over the flue E and the airways E E and their connecting-passages, is placed a longitudinally reciprocating rod J, having at one end the chain or cord J ,which passes about the sprocket-wheel J and thence to the sprocket-whecl II. In the air-passage E is the valve K, centrally pivoted at K and connected by a link K with the valve K which is centrally pivoted at K at the point where thepassage E connects with the flue E.

Keyed to the valve K at the point K is the arm K, which is provided with the long slot K to receive the pin K on the rod J. In the passage E is a valve L, centrally pivoted at I1 and connected by the link L with the valve L which is centrally pivoted at L, at which point there is keyed to said valve L the arm If having a long slot L through which projects the pin L on the rod J.

M is a steam-supply pipe or pipe leading from a chamber containing a fluid under pressure. This pipe leads to the three-way valve M. From this valve projects a handle M provided with a long slot which receives the pin M 011 the rod J. From this threeway valve h lead two pipes, one M connecting with the valves F F, and the other M connecting with the valves G G.

N is a pipe leading from a fluid-fuel-feeding supply-pipe and passingthrough the firewall or supporting-wall of the hearth or bed, and returning thence to the three-way valve From this valve projects the handle N having a long slot to engage the pin N on the rod J'. From this three-way valve lead 5 two pipes, one N to the valves F F, and the other N to the valves G G.

O is a hand-lever pivoted beneath the platform at O and connected by slot and pin at O to the reciprocating rod J.

The use and operation of my invention are as follows: In the ordinary use of open-hearth I furnaces, the general structure of which is too of the furnace across or upon the hearth, the

supply coming thereto from the outside for a certain period, and then the current is re versed. In this latter process the first-mentioned checker-work will be reheated and the air or gases will be drawn through the checkerwork at the opposite side, taking up the heat of such checker-work, and this process is continued by successive reversals until the required work has been performed.

Now, in the device which I have illustrated it is necessary, first, to change the flue or discharge-passage from its connections with the two sides of the furnace; second, to reverse the ainsupply way; third, to reverse the fluidfuel flow; fourth, to reverse the flow of the fuel-forcing fluid, and, fifth, to reverse the positions of the protector-plates H H Moreover, it is desirable, if not essential, that all these reversals or changes should be made practically simultaneously and with the least possible difficulty and from a position whereat the operator may inspect the. hearth. I have arranged the devices so that by the operation of the lever 0 all these reversals will be accomplished, as will now be described. Assuming that the parts are in the position shown in Fig. 2 in full lines, a current of air will flow inward through the passage E past the open valve L, and into the chamber E and thence upward through the checker-work therein. In this same position the valve M is in such position as to furnish the flow of steam, for example, through the pipe M toward the left and thence into all the valves F F. In this position the valve N is also in such position as to send a current of fluidfuel or oil through the, pipe N toward the left into the valves F F. The valves being open and the furnace hot, the fluid fuel will mix with the forcing fluid in the valves F and be delivered thence into the upper part of the chamber E being deflected above the checker-work by the plates E E At the same time a current of air will come up through such chamber from passage-way E and through the heated checker-work, being delivered in the form of a highly-heated gas upon the hearth.

- ward the left. Thus the rod J is moved to-- i In the operation so far as described the lever 0 will, stand in the position indicated in Fig. I

E and through the open valve K and into j the flue E, and thence 'to the smoke-stack. While this process continues, the highlyheated gases leaving the hearth will raise the checker-work E to a high temperature. To reverse this vaction, the lever O is moved toward the left and the valve L will be opened and the valve Lclosed,while at the same time the valve K will be closed and the valve K opened, thus reversing the lead to the flue and the air-supply ways E E By the same motion of the rod J the three-way valves M and N are reversed, so as to send the currents of their respective fluids toward the right, discharging through the valves G. By this same motion of the rod the chain which passes over the sprocket-wheel J 2 and is secured to the sprocket-wheel H rotates such sprocket-wheel over toward the right and raises the plates H which protect the valves G. At the same moment by the pull of the chain H the lever H on the left-hand side of the furnace is raised to lower the plates H which protect the valves F F. Thus it will be seen that the five reversals or changes required are accomplished by the motion of the lever O.

I claim as new and desire to secure by Letters Patent V 1. In a regenerative furnace, the combination of the hearth with a chamber on each side thereof containing regenerating checkerwork through which the air may pass into the furnace, a series of apertures above such checker-work through which the fluid fuel passes, and sliding protector-plates in front of such apertures, as shown, adapted to cover the same when fluid fuel is not being discharged therethrough, as and for the purpose described.

2. In a regenerative furnace, the combination of the hearth with. air and fluid-fuel passages or pipes which open therein at opposite sides thereof and a fluid-fuel-supply reservoir connected therewith, and valves in the several ing therefrom through the opposite ends of the furnace, discharge-valves or burners into which said pipes open, and apertures opening into the furnace at the opposite ends through which such valves project, air-supply passages opening into the space beneath the regenerating checker-work of the f urn ace, and valves therein which alternately connect such passages with the open air and with the flue, a lever operatively connected with and controlling all of such valves, and protector-plates in front of said fluid-fuel discharge valves or burners, the same suspended and connected wit-h said operating-lever.

Signed this 2d day of March, 1889.

WALTER BLAKE WRIGHT.

In presence of- FRANCIS W. PARKER,

CELESTE P. CHAPMAN. 

